bbyant swan



(No Model.)

T. B. SWAN.

HARROW.

No. 344,876.v Patented July 6, 18.86.

....M. l. a

liNiTnn STATES PATENT T. BRYANT SW'AN, OF ATLANTIC, IOWA, ASSIGNOR OF ONE-HALF TO EDMUND V. BURKE, OF SAME PLACE.

HARROW.

SPECIIIELECATION forming part of Letters Patent No. 344,876, dated July 6, 1886.

Applicationjiled February 10, 1886. Serial No. 191,396. (No model.)

To @ZZ whom, t may concern.-

Be it known that I, T. BRYANT SWAN, a citizen of the United States, residing at the city of Atlantic, in the county of Cass and State of Iowa, have invented a new and useful Harrow, of which the following is a specication.

My invention relates to improvements in harrows having toothed rollers which rotate intermittingly.

The objects of myimprovcments are to provide a harrow that will clear itself of all clogs which come in contact with its teeth also, a harrow that will do good work, even at the time it is clearing itself. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a perspective view of the harrow. Fig. 2 is a detailed vi'ew of one of the side pieces of the harrow with the catches and levers.

The frame D consists of two end and two side pieces properly secured to each other. The rollers B B B B are reduced at each end, forming a shoulder which rests against the inner surfaces of the side pieces of the frame D. The reduced portions of the rollers enter and pass through the side pieces of the frame in apertures made to receive them, and project outwardly beyond the side pieces of the frame. The apertures are made of suitable size to allow the easy rotation of the rollers. The pins t t' t' i are firmly secured to the rollers at a point where they will come in contact with the levers b b b and catches a a c c. To each roller are secured several tapering harrowteeth, h h h h. Firmly secured to that reduced part of the rollers which projects outwardly beyond the side pieces of the harrow-frame are the rings d d, having screwed or secured to them one or more of the teeth or spikes, m m. These teeth should be at least as long as the barrow-teeth h h h h, and should be sufficient in number, in conj unction with the teeth h 7L h h, to cause the rollers to revolve when the barrow is moving forward, except when checked by the catches a a ct c.

Pivoted to the side piece of the harrowframe are the levers b b b, which rest at one end on the rollers and at the other end upon the catches ct ct ct a. That portion of the lever between its pivot and the roller upon which it rests is made heavier than its other part.

Pivoted to the side piece of the harrowframe are the catches a a c a, which rest at one end upon the rollers. The other end comes in contact with the under side of the levers b b b. That portion of the catch between its pivot and the roller upon which it rests is made heavier than its other part.

The support or standard 7a issecured to the side piece of the barrow-frame, and has pivoted to it the'lever C, which bends downward at its forward end, coming in contact with the forward catch, ct. Passing through an aper ture made to receive it in the rear end of the 1ever G is the handle n. The aperture in the lever Gis made of suitable size to :allow the handle a to freely turn therein. The lower end of the handle a screws into an oblong piece of metal, w. Between this oblong piece w and the lever C is the sleeve o, which prevents the piece fw and the lever O from approaching each other. The handle has' the ledge e, between which and the 1ever O is the spring c. This spring holds the handle in its place and prevents it from turning too easily.

The pins g g g g are secured to the side piece of the harrow-frame, and are placed a short distance below the lighter end of each catch. While they allow the catches a c a a suficient movement to clear the pins t t' i t', they check a too free movement of the catches.

Secured to the sides of the barrow-frame are the standards s ss s. Pivoted to the standards are the arms 1^ o r r, having firmly se-f85 cured to them the tooth-scrapers E E. There can be a scraper for every roller, if desired. This system of levers, catches, and. pins can be placed upon one or both sides of the barrow.

It is evident that when -the harrow is moving forward, if the back end of the lever O be elevated, it will move the heavier part of the forward catch a upward, so that the pin i can move under the catch, and thus release the front roller, which, being actuated bythe teeth m m and front harroW-teeth, will rotate, causing the front pint' to come in contact with the under side of the front lever b. The pin will force upward the heavier part of the 1ever, which will cause the heavier part of the next backward catch to rise and release the roller upon which it rests. The forward pin i, after moving the lever, comes in contact with the front catch, a, which checks the ICO rotation of the roller. In this manner all the rollers are released and checked until the back roller revolves, when the rear pin i comes in contact with the under side of the piece w, forcing it, with the handle n and the back end of the lever G, upward. At the same time the front end of the lever C descends and moves the forward catch a and releases the front roller. Thus while one roller is revolving the rotation ofthe remainder is suspended. The handle n can be turned and the piece w moved out of the reach of the backward pin z', and the revolution of all the rollers suspended as long as desired. If any clogs come in contact with the teeth of the barrow, the rotation of the rollers allows the barrow to pass over and leave them behind, and while one roller is revolving and clearing itself of obstructions the remainder are doing good service harrowing. If any obstruction be! comes stuck to the teeth of the harrow, it will be removed by the Scrapers E E.

When the roller revolves. the barrow-teeth pass under the'scraper, forcing it upward, and while it isbeing moved upward it scrapes the harroW-teeth from near their base to their points, and then falls back upon the roller.

Having described my inventiomwhat I claim as new,and desire to secure by Letters Patent, is-

1. The combination, in a barrow, of the .frame D, having pivoted to its sides the catches a and levers b, the rollers B, having the pins t' and teeth h, the ring d, having the teeth m, the lever G, having passing loosely through an aperture in its rear end. the handle n, the piece-w, secured to the lower end of the handle n, all constructed and arranged substantially as shown and described.

2. The combination,l in a harrow, of the frame D. having pivoted to it the catches a and levers b, with the lever C, the handle n, the piece w, the rollers B, having the pinsi and teeth k, the rings d, having the teeth m, the

Scrapers E, and arms r, substantially as described.

T. BRYANT SWAN. Witnesses:

J oHN H. SCOTT, JOSEPH BENTON BooKAFELLoW. 

